#ifndef __LINUX_KERNEL_H__
#define __LINUX_KERNEL_H__

#include "linux/types.h"

#define HZ                      100

#define INT_MAX ((int)(~0U >> 1))
#define INT_MIN (-INT_MAX - 1)

#define USHRT_MAX	((u16)(~0U))
#define SHRT_MAX	((s16)(USHRT_MAX>>1))
#define SHRT_MIN	((s16)(-SHRT_MAX - 1))
#define INT_MIN		(-INT_MAX - 1)
#define UINT_MAX	(~0U)
#define LONG_MAX	((long)(~0UL>>1))
#define LONG_MIN	(-LONG_MAX - 1)
#define ULONG_MAX	(~0UL)
#define LLONG_MAX	((long long)(~0ULL>>1))
#define LLONG_MIN	(-LLONG_MAX - 1)
#define ULLONG_MAX	(~0ULL)
#define SIZE_MAX	(~(size_t)0)

#define U8_MAX		((u8)~0U)
#define S8_MAX		((s8)(U8_MAX>>1))
#define S8_MIN		((s8)(-S8_MAX - 1))
#define U16_MAX		((u16)~0U)
#define S16_MAX		((s16)(U16_MAX>>1))
#define S16_MIN		((s16)(-S16_MAX - 1))
#define U32_MAX		((u32)~0U)
#define S32_MAX		((s32)(U32_MAX>>1))
#define S32_MIN		((s32)(-S32_MAX - 1))
#define U64_MAX		((u64)~0ULL)
#define S64_MAX		((s64)(U64_MAX>>1))
#define S64_MIN		((s64)(-S64_MAX - 1))

#define OS_INIT_PROCESS_PID		0
#define OS_SYS_PROCESS_PID		1
#define OS_IDLE_PROCESS_PID		2
#define OS_NETIF_PROCESS_PID    3 

extern int sys_init_sys_timer(void);
extern int sys_init_tty(void);
extern int sys_init_irq(void);
int isspace(int c);
int isdigit(int c);
int digit_value(char c);
int kstrtoint(char *s, unsigned int base, int *res);

#define min(x, y)   ((x) < (y) ? (x) : (y))

#endif
